Collagen concentration, measured by hydroxyproline content, in the infarct region 30 days post-MI was not significantly different between genotypes (A, Bgn+/0 n=6, Bgn−/0 n=7, P=0.4). Bgn−/0 left ventricles tended to have less collagen deposition in the remote region (B), but the difference was not statistically significant (Bgn+/0: n=6, Bgn−/0: n=4, P=0.07).